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<body lang=ZH-CN link=blue vlink=purple style='text-justify-trim:punctuation'>

<div class=WordSection1 style='layout-grid:15.6pt'>

<p class=ab style='margin-left:20.0pt;text-indent:-20.0pt'><a
name="_Toc53320632"><span style='font-family:黑体'>程序</span><span lang=EN-US>11-1
linux/kernel/math/math_emulate.c</span></a></p>

<div class=a align=center style='text-align:center'><span lang=EN-US>

<hr size=4 width="100%" align=center>

</span></div>

<p class=a><span lang=EN-US>&nbsp; <u><span style='color:blue'>1</span></u> <b><i>/*</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp; <u><span style='color:blue'>2</span></u> <b><i>&nbsp;*
linux/kernel/math/math_emulate.c</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp; <u><span style='color:blue'>3</span></u> <b><i>&nbsp;*</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp; <u><span style='color:blue'>4</span></u> <b><i>&nbsp;*
(C) 1991 Linus Torvalds</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp; <u><span style='color:blue'>5</span></u> <b><i>&nbsp;*/</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp; <u><span style='color:blue'>6</span></u> </span></p>

<p class=a><span lang=EN-US>&nbsp; <u><span style='color:blue'>7</span></u> <b><i>/*</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp; <u><span style='color:blue'>8</span></u> <b><i>&nbsp;*
Limited emulation 27.12.91 - mostly loads/stores, which gcc wants</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp; <u><span style='color:blue'>9</span></u> <b><i>&nbsp;*
even for soft-float, unless you use bruce evans' patches. The patches</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>10</span></u> <b><i>&nbsp;*
are great, but they have to be re-applied for every version, and the</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>11</span></u> <b><i>&nbsp;*
library is different for soft-float and 80387. So emulation is more</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>12</span></u> <b><i>&nbsp;*
practical, even though it's slower.</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>13</span></u> <b><i>&nbsp;*</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>14</span></u> <b><i>&nbsp;*
28.12.91 - loads/stores work, even BCD. I'll have to start thinking</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>15</span></u> <b><i>&nbsp;*
about add/sub/mul/div. Urgel. I should find some good source, but I'll</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>16</span></u> <b><i>&nbsp;*
just fake up something.</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>17</span></u> <b><i>&nbsp;*</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>18</span></u> <b><i>&nbsp;*
30.12.91 - add/sub/mul/div/com seem to work mostly. I should really</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>19</span></u> <b><i>&nbsp;*
test every possible combination.</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>20</span></u> <b><i>&nbsp;*/</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; /*</span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp; * </span>仿真范围有限的程序 <span
lang=EN-US>91.12.27 - </span>绝大多数是一些加载<span lang=EN-US>/</span>存储指令。除非你使用</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp; * </span>了<span
lang=EN-US>Bruce Evans</span>的补丁程序，否则即使使用软件执行浮点运算，<span lang=EN-US>gcc</span>也需要这些</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp; * </span>指令。<span
lang=EN-US>Bruce</span>的补丁程序非常好，但每次更换<span lang=EN-US>gcc</span>版本你都得用这个补丁程序。</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp; * </span>而且对于软件浮点实现和<span
lang=EN-US>80387</span>，所使用的库是不同的。因此使用仿真是更为实</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp; * </span>际的方法，尽管仿真方法更慢。</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp; *</span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp; * 91.12.28 - </span>加载<span
lang=EN-US>/</span>存储协处理器指令可以用了，即使是<span lang=EN-US>BCD</span>码的也能使用。我将</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp; * </span>开始考虑实现<span
lang=EN-US> add/sub/mul/div </span>指令。唉，我应该找一些好的资料，不过现在</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp; * </span>我会先仿造一些操作。</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp; *</span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp; * 91.12.30 -
add/sub/mul/div/com </span>这些指令好像大多数都可以使用了。我真应</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp; * </span>该测试每种指令可能的组合操作。</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp; */</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>21</span></u> </span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>22</span></u> <b><i>/*</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>23</span></u> <b><i>&nbsp;*
This file is full of ugly macros etc: one problem was that gcc simply</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>24</span></u> <b><i>&nbsp;*
didn't want to make the structures as they should be: it has to try to</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>25</span></u> <b><i>&nbsp;*
align them. Sickening code, but at least I've hidden the ugly things</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>26</span></u> <b><i>&nbsp;*
in this one file: the other files don't need to know about these things.</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>27</span></u> <b><i>&nbsp;*</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>28</span></u> <b><i>&nbsp;*
The other files also don't care about ST(x) etc - they just get addresses</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>29</span></u> <b><i>&nbsp;*
to 80-bit temporary reals, and do with them as they please. I wanted to</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>30</span></u> <b><i>&nbsp;*
hide most of the 387-specific things here.</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>31</span></u> <b><i>&nbsp;*/</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; /*</span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp; * </span>这个程序中到处都是些别扭的宏：问题之一是<span
lang=EN-US>gcc</span>就是不想把结构建立成其应该</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp; * </span>成为的样子：<span
lang=EN-US>gcc </span>企图对结构进行对齐处理。真是讨厌，不过我起码已经把所有</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp; * </span>蹩脚的代码都隐藏在这么一个文件中了：其他程序文件不需要了解这些信息。</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp; *</span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp; * </span>其他的程序也不需要知道<span
lang=EN-US>ST(x)</span>等<span lang=EN-US>80387</span>内部结构<span lang=EN-US> - </span>它们只需要得到<span
lang=EN-US>80</span>位临时</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp; * </span>实数的地址就可以随意操作。我想尽可能在这里隐藏所有<span
lang=EN-US>387</span>专有信息。</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp; */</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>32</span></u> </span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>33</span></u>
#include &lt;signal.h&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; // </span>信号头文件。定义信号符号，信号结构及信号操作函数原型。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>34</span></u> </span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>35</span></u>
#define <u><span style='color:blue'>__ALIGNED_TEMP_REAL</span></u> 1</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>36</span></u>
#include &lt;linux/math_emu.h&gt; // </span>协处理器头文件。定义临时实数结构和<span lang=EN-US>387</span>寄存器操作宏等。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>37</span></u>
#include &lt;linux/kernel.h&gt;&nbsp;&nbsp; // </span>内核头文件。含有一些内核常用函数的原形定义。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>38</span></u>
#include &lt;asm/segment.h&gt;&nbsp;&nbsp;&nbsp; // </span>段操作头文件。定义了有关段寄存器操作的嵌入式汇编函数。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>39</span></u> </span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>40</span></u>
#define <u><span style='color:blue'>bswapw</span></u>(<u><span
style='color:blue'>x</span></u>) __asm__(<i>&quot;xchgb %%al,%%ah&quot;</i>:<i>&quot;=a&quot;</i>
(<u><span style='color:blue'>x</span></u>):<i>&quot;&quot;</i> ((short)<u><span
style='color:blue'>x</span></u>)) // </span>交换<span lang=EN-US>2</span>字节位置。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>41</span></u>
#define <u><span style='color:blue'>ST</span></u>(<u><span style='color:blue'>x</span></u>)
(*<u><span style='color:blue'>__st</span></u>((<u><span style='color:blue'>x</span></u>)))&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// </span>取仿真的<span lang=EN-US>ST(x)</span>累加器值。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>42</span></u>
#define <u><span style='color:blue'>PST</span></u>(<u><span style='color:blue'>x</span></u>)
((const <u><span style='color:blue'>temp_real</span></u> *) <u><span
style='color:blue'>__st</span></u>((<u><span style='color:blue'>x</span></u>)))&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// </span>取仿真的<span lang=EN-US>ST(x)</span>累加器的指针。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>43</span></u> </span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>44</span></u> <b><i>/*</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>45</span></u> <b><i>&nbsp;*
We don't want these inlined - it gets too messy in the machine-code.</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>46</span></u> <b><i>&nbsp;*/</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; /* </span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp; * </span>我们不想让这些成为嵌入的语句<span
lang=EN-US> - </span>因为这会使得到的机器码太混乱。</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp; */ </span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>以下这些是相同名称浮点指令的仿真函数。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>47</span></u>
static void <u><span style='color:blue'>fpop</span></u>(void);</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>48</span></u>
static void <u><span style='color:blue'>fpush</span></u>(void);</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>49</span></u>
static void <u><span style='color:blue'>fxchg</span></u>(<u><span
style='color:blue'>temp_real_unaligned</span></u> * a, <u><span
style='color:blue'>temp_real_unaligned</span></u> * b);</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>50</span></u>
static <u><span style='color:blue'>temp_real_unaligned</span></u> * <u><span
style='color:blue'>__st</span></u>(int i);</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>51</span></u> </span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>执行浮点指令仿真。</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>该函数首先检测仿真的<span
lang=EN-US>I387</span>结构状态字寄存器中是否有未屏蔽的异常标志置位。若有则对状</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>态字中忙标志<span
lang=EN-US>B</span>进行设置。然后把指令指针保存起来，并取出代码指针<span lang=EN-US> EIP </span>处的<span
lang=EN-US> 2</span>字节浮点</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>指令代码 <span lang=EN-US>code</span>。接着分析代码<span
lang=EN-US> code</span>，并根据其含义进行处理。针对不同代码类型值，<span lang=EN-US>Linus</span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>使用了几个不同的<span
lang=EN-US> switch </span>程序块进行仿真处理。</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>参数是<span lang=EN-US>info</span>结构的指针。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>52</span></u>
static void <u><span style='color:blue'>do_emu</span></u>(struct <u><span
style='color:blue'>info</span></u> * <u><span style='color:blue'>info</span></u>)</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>53</span></u> {</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>54</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
unsigned short code;</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>55</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>temp_real</span></u> tmp;</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>56</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
char * address;</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>57</span></u> </span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>该函数首先检测仿真的<span
lang=EN-US>I387</span>结构状态字寄存器中是否有未屏蔽的异常标志置位。若有就设置</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>状态字中的忙标志<span
lang=EN-US> B</span>（位<span lang=EN-US>15</span>），否则复位<span lang=EN-US> B</span>标志。然后我们把指令指针保存起来。再看看执</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>行本函数的代码是否是用户代码。如果不是，即调用者的代码段选择符不等于
<span lang=EN-US>0x0f</span>，则说明</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>内核中有代码使用了浮点指令。于是在显示出浮点指令出的
<span lang=EN-US>CS</span>、<span lang=EN-US>EIP </span>值和信息“内核中需要</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>数学仿真<span lang=EN-US>”</span>后停机。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>58</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
if (<u><span style='color:blue'>I387</span></u>.cwd &amp; <u><span
style='color:blue'>I387</span></u>.<u><span style='color:blue'>swd</span></u>
&amp; 0x3f)</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>59</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>I387</span></u>.<u><span style='color:blue'>swd</span></u>
|= 0x8000;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// </span>设置忙标志<span lang=EN-US>B</span>。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>60</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
else</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>61</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>I387</span></u>.<u><span style='color:blue'>swd</span></u>
&amp;= 0x7fff;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// </span>清忙标志<span lang=EN-US>B</span>。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>62</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>ORIG_EIP</span></u> = <u><span style='color:blue'>EIP</span></u>;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// </span>保存浮点指令指针。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>63</span></u> <b><i>/*
0x0007 means user code space */</i></b></span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>64</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
if (<u><span style='color:blue'>CS</span></u> != 0x000F) {&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; // </span>不是用户代码则停机。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>65</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>printk</span></u>(<i>&quot;math_emulate:
%04x:%08x\n\r&quot;</i>,<u><span style='color:blue'>CS</span></u>,<u><span
style='color:blue'>EIP</span></u>);</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>66</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>panic</span></u>(<i>&quot;Math emulation needed in
kernel&quot;</i>);</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>67</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
}</span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>然后我们取出代码指针<span
lang=EN-US> EIP </span>处的<span lang=EN-US> 2</span>字节浮点指令代码 <span lang=EN-US>code</span>。
由于<span lang=EN-US>Intel CPU</span>存储数据时是</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>“小头”（<span lang=EN-US>Little
endien</span>）在前的，此时取出的代码正好与指令的第<span lang=EN-US>1</span>、第<span lang=EN-US>2</span>字节顺序颠倒。</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>因此我们需要交换一下 <span
lang=EN-US>code </span>中两个字节的顺序。然后再屏蔽掉第<span lang=EN-US>1</span>个代码字节中的<span
lang=EN-US> ESC </span>位</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>（二进制<span lang=EN-US>11011</span>）。接着把浮点指令指针<span
lang=EN-US>EIP</span>保存到<span lang=EN-US>TSS</span>段<span lang=EN-US>i387</span>结构中的<span
lang=EN-US>fip</span>字段中，而<span lang=EN-US>CS</span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>保存到 <span lang=EN-US>fcs</span>字段中，同时把略微处理过的浮点指令代码
<span lang=EN-US>code </span>放到 <span lang=EN-US>fcs </span>字段的高<span
lang=EN-US> 16 </span>位中。</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>保存这些值是为了在出现仿真的处理器异常时程序可以像使用真实的协处理器一样进行处理。</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>最后让<span lang=EN-US>EIP</span>指向随后的浮点指令或操作数。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>68</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
code = <u><span style='color:blue'>get_fs_word</span></u>((unsigned short *) <u><span
style='color:blue'>EIP</span></u>);&nbsp; // </span>取<span lang=EN-US>2</span>字节的浮点指令代码。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>69</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>bswapw</span></u>(code);&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// </span>交换高低字节。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>70</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
code &amp;= 0x7ff;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// </span>屏蔽代码中的<span lang=EN-US>ESC</span>码。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>71</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>I387</span></u>.fip = <u><span style='color:blue'>EIP</span></u>;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// </span>保存指令指针。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>72</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
*(unsigned short *) &amp;<u><span style='color:blue'>I387</span></u>.fcs = <u><span
style='color:blue'>CS</span></u>;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;//
</span>保存代码段选择符。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>73</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
*(1+(unsigned short *) &amp;<u><span style='color:blue'>I387</span></u>.fcs) =
code;&nbsp;&nbsp;&nbsp; // </span>保存代码。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>74</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>EIP</span></u> += 2;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// </span>指令指针指向下一个字节。</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>然后分析代码值<span
lang=EN-US>code</span>，并根据其含义进行处理。针对不同代码类型值，<span lang=EN-US>Linus</span>使用了几个不同</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>的<span lang=EN-US>
switch </span>程序块进行处理。首先，若指令操作码是具有固定代码值（与寄存器等无关），则</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>在下面处理。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>75</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
switch (code) {</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>76</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x1d0: <b><i>/* fnop */</i></b>&nbsp;&nbsp;&nbsp; /* </span>空操作指令<span
lang=EN-US>FNOP */</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>77</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>78</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x1d1: case 0x1d2: case 0x1d3:&nbsp; // </span>无效指令代码。发信号，退出。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>79</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x1d4: case 0x1d5: case 0x1d6: case 0x1d7:</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>80</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>math_abort</span></u>(<u><span style='color:blue'>info</span></u>,1&lt;&lt;(<u><span
style='color:blue'>SIGILL</span></u>-1));</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>81</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x1e0:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FCHS - </span>改变<span lang=EN-US>ST</span>符号位。即<span lang=EN-US>ST = -ST</span>。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>82</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>ST</span></u>(0).exponent ^= 0x8000;</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>83</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>84</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x1e1:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FABS - </span>取绝对值。即<span lang=EN-US>ST = |ST|</span>。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>85</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>ST</span></u>(0).exponent &amp;= 0x7fff;</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>86</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>87</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x1e2: case 0x1e3:&nbsp;&nbsp; // </span>无效指令代码。发信号，退出。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>88</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>math_abort</span></u>(<u><span style='color:blue'>info</span></u>,1&lt;&lt;(<u><span
style='color:blue'>SIGILL</span></u>-1));</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>89</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x1e4:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FTST - </span>测试<span lang=EN-US>TS</span>，同时设置状态字中<span lang=EN-US>Cn</span>。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>90</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>ftst</span></u>(<u><span style='color:blue'>PST</span></u>(0));</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>91</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>92</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x1e5:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;//
FXAM - </span>检查<span lang=EN-US>TS</span>值，同时修改状态字中<span lang=EN-US>Cn</span>。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>93</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>printk</span></u>(<i>&quot;fxam not
implemented\n\r&quot;</i>);&nbsp; // </span>未实现。发信号退出。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>94</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>math_abort</span></u>(<u><span style='color:blue'>info</span></u>,1&lt;&lt;(<u><span
style='color:blue'>SIGILL</span></u>-1));</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>95</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x1e6: case 0x1e7:&nbsp;&nbsp; // </span>无效指令代码。发信号，退出。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>96</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>math_abort</span></u>(<u><span style='color:blue'>info</span></u>,1&lt;&lt;(<u><span
style='color:blue'>SIGILL</span></u>-1));</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>97</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x1e8:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FLD1 - </span>加载常数<span lang=EN-US>1.0 </span>到累加器<span lang=EN-US>ST</span>。</p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>98</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpush</span></u>();</span></p>

<p class=a><span lang=EN-US>&nbsp;<u><span style='color:blue'>99</span></u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>ST</span></u>(0) = <u><span style='color:blue'>CONST1</span></u>;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>100</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>101</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x1e9:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FLDL2T - </span>加载常数<span lang=EN-US>Log<sub>2</sub>(10) </span>到累加器<span
lang=EN-US>ST</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>102</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpush</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>103</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>ST</span></u>(0) = <u><span style='color:blue'>CONSTL2T</span></u>;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>104</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>105</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x1ea:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FLDL2E - </span>加载常数<span lang=EN-US>Log<sub>2</sub>(e) </span>到累加器<span
lang=EN-US>ST</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>106</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpush</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>107</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>ST</span></u>(0) = <u><span style='color:blue'>CONSTL2E</span></u>;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>108</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>109</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x1eb:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FLDPI - </span>加载常数<span lang=EN-US>Pi </span>到累加器<span lang=EN-US>ST</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>110</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpush</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>111</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<u><span
style='color:blue'>ST</span></u>(0) = <u><span style='color:blue'>CONSTPI</span></u>;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>112</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>113</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x1ec:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FLDLG2 - </span>加载常数<span lang=EN-US>Log<sub>10</sub>(2) </span>到累加器<span
lang=EN-US>ST</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>114</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpush</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>115</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>ST</span></u>(0) = <u><span style='color:blue'>CONSTLG2</span></u>;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>116</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>117</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x1ed:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FLDLN2 - </span>加载常数<span lang=EN-US>Log<sub>e</sub>(2) </span>到累加器<span
lang=EN-US>ST</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>118</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpush</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>119</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>ST</span></u>(0) = <u><span style='color:blue'>CONSTLN2</span></u>;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>120</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>121</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x1ee:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FLDZ - </span>加载常数<span lang=EN-US>0.0 </span>到累加器<span lang=EN-US>ST</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>122</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpush</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>123</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>ST</span></u>(0) = <u><span style='color:blue'>CONSTZ</span></u>;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>124</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>125</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x1ef:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;// </span>无效和未实现仿真指令代码。发信号，退出。</p>

<p class=a><u><span lang=EN-US style='color:blue'>126</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>math_abort</span></u>(<u><span style='color:blue'>info</span></u>,1&lt;&lt;(<u><span
style='color:blue'>SIGILL</span></u>-1));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>127</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x1f0: case 0x1f1: case 0x1f2: case 0x1f3:</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>128</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x1f4: case 0x1f5: case 0x1f6: case 0x1f7:</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>129</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x1f8: case 0x1f9: case 0x1fa: case 0x1fb:</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>130</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x1fc: case 0x1fd: case 0x1fe: case 0x1ff:</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>131</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>printk</span></u>(<i>&quot;%04x fxxx not
implemented\n\r&quot;</i>,code + 0xc800);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>132</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>math_abort</span></u>(<u><span style='color:blue'>info</span></u>,1&lt;&lt;(<u><span
style='color:blue'>SIGILL</span></u>-1));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>133</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x2e9:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FUCOMPP - </span>无次序比较。</p>

<p class=a><u><span lang=EN-US style='color:blue'>134</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fucom</span></u>(<u><span style='color:blue'>PST</span></u>(1),<u><span
style='color:blue'>PST</span></u>(0));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>135</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpop</span></u>(); <u><span style='color:blue'>fpop</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>136</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>137</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x3d0: case 0x3d1:&nbsp;&nbsp; // FNOP - </span>对<span lang=EN-US>387</span>。<span
lang=EN-US>!!</span>应该是<span lang=EN-US>0x3e0, 0x3e1</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>138</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>139</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x3e2:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FCLEX - </span>清状态字中异常标志。</p>

<p class=a><u><span lang=EN-US style='color:blue'>140</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>I387</span></u>.<u><span style='color:blue'>swd</span></u>
&amp;= 0x7f00;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>141</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>142</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x3e3:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FINIT - </span>初始化协处理器。</p>

<p class=a><u><span lang=EN-US style='color:blue'>143</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<u><span
style='color:blue'>I387</span></u>.cwd = 0x037f;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>144</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>I387</span></u>.<u><span style='color:blue'>swd</span></u>
= 0x0000;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>145</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>I387</span></u>.twd = 0x0000;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>146</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>147</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x3e4:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FNOP - </span>对<span lang=EN-US>80387</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>148</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>149</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x6d9:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FCOMPP - ST(1)</span>与<span lang=EN-US>ST</span>比较，出栈操作两次。</p>

<p class=a><u><span lang=EN-US style='color:blue'>150</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fcom</span></u>(<u><span style='color:blue'>PST</span></u>(1),<u><span
style='color:blue'>PST</span></u>(0));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>151</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpop</span></u>(); <u><span style='color:blue'>fpop</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>152</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>153</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x7e0:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FSTSW AX - </span>保存当前状态字到<span lang=EN-US>AX</span>寄存器中。</p>

<p class=a><u><span lang=EN-US style='color:blue'>154</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
*(short *) &amp;<u><span style='color:blue'>EAX</span></u> = <u><span
style='color:blue'>I387</span></u>.<u><span style='color:blue'>swd</span></u>;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>155</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>156</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }</span></p>

<p class=a><span lang=EN-US>&nbsp;</span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>下面开始处理第<span
lang=EN-US>2</span>字节最后<span lang=EN-US>3</span>比特是<span lang=EN-US>REG</span>的指令。即<span
lang=EN-US>11011,XXXXXXXX,REG</span>形式的代码。</p>

<p class=a><u><span lang=EN-US style='color:blue'>157</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; switch (code
&gt;&gt; 3) {</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>158</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;case
0x18:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FADD ST, ST(i)</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>159</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fadd</span></u>(<u><span style='color:blue'>PST</span></u>(0),<u><span
style='color:blue'>PST</span></u>(code &amp; 7),&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>160</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(0));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>161</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>162</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x19:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FMUL ST, ST(i)</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>163</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fmul</span></u>(<u><span style='color:blue'>PST</span></u>(0),<u><span
style='color:blue'>PST</span></u>(code &amp; 7),&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>164</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(0));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>165</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>166</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x1a:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; // FCOM ST(i)</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>167</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fcom</span></u>(<u><span style='color:blue'>PST</span></u>(code
&amp; 7),&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>168</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(0));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>169</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>170</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x1b:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FCOMP ST(i)</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>171</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fcom</span></u>(<u><span style='color:blue'>PST</span></u>(code
&amp; 7),&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>172</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(0));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>173</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpop</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>174</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>175</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x1c:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; // FSUB ST, ST(i)</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>176</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;<u><span
style='color:blue'>ST</span></u>(code &amp; 7),&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>177</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
tmp.exponent ^= 0x8000;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>178</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fadd</span></u>(<u><span style='color:blue'>PST</span></u>(0),&amp;tmp,&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>179</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(0));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>180</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>181</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x1d:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FSUBR ST, ST(i)</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>182</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>ST</span></u>(0).exponent ^= 0x8000;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>183</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fadd</span></u>(<u><span style='color:blue'>PST</span></u>(0),<u><span
style='color:blue'>PST</span></u>(code &amp; 7),&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>184</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(0));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>185</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>186</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x1e:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FDIV ST, ST(i)</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>187</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fdiv</span></u>(<u><span style='color:blue'>PST</span></u>(0),<u><span
style='color:blue'>PST</span></u>(code &amp; 7),&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>188</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(0));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>189</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>190</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x1f:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; // FDIVR ST, ST(i)</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>191</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fdiv</span></u>(<u><span style='color:blue'>PST</span></u>(code
&amp; 7),<u><span style='color:blue'>PST</span></u>(0),&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>192</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(0));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>193</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>194</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x38:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FLD ST(i)</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>195</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpush</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>196</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<u><span
style='color:blue'>ST</span></u>(0) = <u><span style='color:blue'>ST</span></u>((code
&amp; 7)+1);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>197</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>198</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x39:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FXCH ST(i)</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>199</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fxchg</span></u>(&amp;<u><span style='color:blue'>ST</span></u>(0),&amp;<u><span
style='color:blue'>ST</span></u>(code &amp; 7));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>200</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>201</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x3b:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FSTP ST(i)</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>202</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>ST</span></u>(code &amp; 7) = <u><span
style='color:blue'>ST</span></u>(0);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>203</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpop</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>204</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>205</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x98:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FADD ST(i), ST</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>206</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fadd</span></u>(<u><span style='color:blue'>PST</span></u>(0),<u><span
style='color:blue'>PST</span></u>(code &amp; 7),&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>207</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(code &amp; 7));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>208</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>209</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x99:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FMUL ST(i), ST</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>210</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fmul</span></u>(<u><span style='color:blue'>PST</span></u>(0),<u><span
style='color:blue'>PST</span></u>(code &amp; 7),&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>211</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(code &amp; 7));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>212</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>213</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x9a:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; // FCOM ST(i)</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>214</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fcom</span></u>(<u><span style='color:blue'>PST</span></u>(code
&amp; 7),<u><span style='color:blue'>PST</span></u>(0));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>215</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>216</span></u><span
lang=EN-US> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;case
0x9b:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FCOMP ST(i)</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>217</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fcom</span></u>(<u><span style='color:blue'>PST</span></u>(code
&amp; 7),<u><span style='color:blue'>PST</span></u>(0));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>218</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpop</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>219</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>220</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x9c:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; // FSUBR ST(i), ST</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>221</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>ST</span></u>(code &amp; 7).exponent ^= 0x8000;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>222</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fadd</span></u>(<u><span style='color:blue'>PST</span></u>(0),<u><span
style='color:blue'>PST</span></u>(code &amp; 7),&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>223</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(code &amp; 7));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>224</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>225</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x9d:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FSUB ST(i), ST</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>226</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;<u><span
style='color:blue'>ST</span></u>(0),&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>227</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
tmp.exponent ^= 0x8000;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>228</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fadd</span></u>(<u><span style='color:blue'>PST</span></u>(code
&amp; 7),&amp;tmp,&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>229</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(code &amp; 7));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>230</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>231</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x9e:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FDIVR ST(i), ST</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>232</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fdiv</span></u>(<u><span style='color:blue'>PST</span></u>(0),<u><span
style='color:blue'>PST</span></u>(code &amp; 7),&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>233</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(code &amp; 7));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>234</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>235</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x9f:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; // FDIV ST(i), ST</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>236</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fdiv</span></u>(<u><span style='color:blue'>PST</span></u>(code
&amp; 7),<u><span style='color:blue'>PST</span></u>(0),&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>237</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(code &amp; 7));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>238</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>239</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xb8:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FFREE ST(i)</span>。未实现。</p>

<p class=a><u><span lang=EN-US style='color:blue'>240</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>printk</span></u>(<i>&quot;ffree not
implemented\n\r&quot;</i>);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>241</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>math_abort</span></u>(<u><span style='color:blue'>info</span></u>,1&lt;&lt;(<u><span
style='color:blue'>SIGILL</span></u>-1));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>242</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xb9:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FXCH ST(i)</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>243</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fxchg</span></u>(&amp;<u><span style='color:blue'>ST</span></u>(0),&amp;<u><span
style='color:blue'>ST</span></u>(code &amp; 7));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>244</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>245</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xba:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FST ST(i)</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>246</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>ST</span></u>(code &amp; 7) = <u><span
style='color:blue'>ST</span></u>(0);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>247</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>248</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xbb:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FSTP ST(i)</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>249</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>ST</span></u>(code &amp; 7) = <u><span
style='color:blue'>ST</span></u>(0);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>250</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpop</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>251</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>252</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xbc:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FUCOM ST(i)</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>253</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fucom</span></u>(<u><span style='color:blue'>PST</span></u>(code
&amp; 7),<u><span style='color:blue'>PST</span></u>(0));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>254</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>255</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xbd:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FUCOMP ST(i)</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>256</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fucom</span></u>(<u><span style='color:blue'>PST</span></u>(code
&amp; 7),<u><span style='color:blue'>PST</span></u>(0));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>257</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpop</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>258</span></u><span
lang=EN-US> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>259</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xd8:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FADDP ST(i), ST</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>260</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fadd</span></u>(<u><span style='color:blue'>PST</span></u>(code
&amp; 7),<u><span style='color:blue'>PST</span></u>(0),&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>261</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(code &amp; 7));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>262</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpop</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>263</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>264</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xd9:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FMULP ST(i), ST</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>265</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fmul</span></u>(<u><span style='color:blue'>PST</span></u>(code
&amp; 7),<u><span style='color:blue'>PST</span></u>(0),&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>266</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(code &amp; 7));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>267</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpop</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>268</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>269</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xda:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FCOMP ST(i)</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>270</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fcom</span></u>(<u><span style='color:blue'>PST</span></u>(code
&amp; 7),<u><span style='color:blue'>PST</span></u>(0));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>271</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpop</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>272</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>273</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xdc:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FSUBRP ST(i), ST</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>274</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>ST</span></u>(code &amp; 7).exponent ^= 0x8000;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>275</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fadd</span></u>(<u><span style='color:blue'>PST</span></u>(0),<u><span
style='color:blue'>PST</span></u>(code &amp; 7),&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>276</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(code &amp; 7));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>277</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;<u><span style='color:blue'>fpop</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>278</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>279</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xdd:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FSUBP ST(i), ST</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>280</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;<u><span
style='color:blue'>ST</span></u>(0),&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>281</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
tmp.exponent ^= 0x8000;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>282</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fadd</span></u>(<u><span style='color:blue'>PST</span></u>(code
&amp; 7),&amp;tmp,&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>283</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(code &amp; 7));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>284</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpop</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>285</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>286</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xde:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FDIVRP ST(i), ST</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>287</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fdiv</span></u>(<u><span style='color:blue'>PST</span></u>(0),<u><span
style='color:blue'>PST</span></u>(code &amp; 7),&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>288</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(code &amp; 7));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>289</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpop</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>290</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>291</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xdf:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FDIVP ST(i), ST</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>292</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;<u><span style='color:blue'>fdiv</span></u>(<u><span style='color:blue'>PST</span></u>(code
&amp; 7),<u><span style='color:blue'>PST</span></u>(0),&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>293</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(code &amp; 7));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>294</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpop</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>295</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>296</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xf8:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FFREE ST(i)</span>。未实现。</p>

<p class=a><u><span lang=EN-US style='color:blue'>297</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>printk</span></u>(<i>&quot;ffree not
implemented\n\r&quot;</i>);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>298</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>math_abort</span></u>(<u><span style='color:blue'>info</span></u>,1&lt;&lt;(<u><span
style='color:blue'>SIGILL</span></u>-1));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>299</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpop</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>300</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>301</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xf9:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FXCH ST(i)</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>302</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fxchg</span></u>(&amp;<u><span style='color:blue'>ST</span></u>(0),&amp;<u><span
style='color:blue'>ST</span></u>(code &amp; 7));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>303</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>304</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xfa:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FSTP ST(i)</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>305</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xfb:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FSTP ST(i)</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>306</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>ST</span></u>(code &amp; 7) = <u><span
style='color:blue'>ST</span></u>(0);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>307</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpop</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>308</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>309</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }</span></p>

<p class=a><span lang=EN-US>&nbsp;</span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>处理第<span lang=EN-US>2</span>个字节位<span
lang=EN-US>7--6</span>是<span lang=EN-US>MOD</span>、位<span lang=EN-US>2--0</span>是<span
lang=EN-US>R/M</span>的指令，即 <span lang=EN-US>11011,XXX,MOD,XXX,R/M </span>形式的</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>代码。<span lang=EN-US>MOD</span>在各子程序中处理，因此这里首先让代码与上<span
lang=EN-US>0xe7</span>（<span lang=EN-US>0b11100111</span>）屏蔽掉<span lang=EN-US>MOD</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>310</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; switch
((code&gt;&gt;3) &amp; 0xe7) {</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>311</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x22:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FST &nbsp;- </span>保存单精度实数（短实数）。</p>

<p class=a><u><span lang=EN-US style='color:blue'>312</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>put_short_real</span></u>(<u><span
style='color:blue'>PST</span></u>(0),<u><span style='color:blue'>info</span></u>,code);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>313</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>314</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x23:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FSTP &nbsp;- </span>保存单精度实数（短实数）。</p>

<p class=a><u><span lang=EN-US style='color:blue'>315</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>put_short_real</span></u>(<u><span
style='color:blue'>PST</span></u>(0),<u><span style='color:blue'>info</span></u>,code);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>316</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpop</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>317</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>318</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x24:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FLDENV - </span>加载协处理器状态和控制寄存器等。</p>

<p class=a><u><span lang=EN-US style='color:blue'>319</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
address = <u><span style='color:blue'>ea</span></u>(<u><span style='color:blue'>info</span></u>,code);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>320</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
for (code = 0 ; code &lt; 7 ; code++) {</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>321</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
((long *) &amp; <u><span style='color:blue'>I387</span></u>)[code] =</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>322</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>get_fs_long</span></u>((unsigned long *) address);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>323</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
address += 4;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>324</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
}</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>325</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>326</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x25:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FLDCW - </span>加载控制字。</p>

<p class=a><u><span lang=EN-US style='color:blue'>327</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
address = <u><span style='color:blue'>ea</span></u>(<u><span style='color:blue'>info</span></u>,code);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>328</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;*(unsigned short *) &amp;<u><span style='color:blue'>I387</span></u>.cwd
=</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>329</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>get_fs_word</span></u>((unsigned short *) address);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>330</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>331</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x26:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FSTENV - </span>储存协处理器状态和控制寄存器等。</p>

<p class=a><u><span lang=EN-US style='color:blue'>332</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
address = <u><span style='color:blue'>ea</span></u>(<u><span style='color:blue'>info</span></u>,code);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>333</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>verify_area</span></u>(address,28);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>334</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
for (code = 0 ; code &lt; 7 ; code++) {</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>335</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>put_fs_long</span></u>( ((long *) &amp; <u><span
style='color:blue'>I387</span></u>)[code],</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>336</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
(unsigned long *) address);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>337</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
address += 4;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>338</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
}</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>339</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>340</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x27:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FSTCW - </span>储存控制字。</p>

<p class=a><u><span lang=EN-US style='color:blue'>341</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
address = <u><span style='color:blue'>ea</span></u>(<u><span style='color:blue'>info</span></u>,code);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>342</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>verify_area</span></u>(address,2);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>343</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>put_fs_word</span></u>(<u><span style='color:blue'>I387</span></u>.cwd,(short
*) address);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>344</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>345</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x62:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FIST - </span>储存短整形数。</p>

<p class=a><u><span lang=EN-US style='color:blue'>346</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;<u><span style='color:blue'>put_long_int</span></u>(<u><span
style='color:blue'>PST</span></u>(0),<u><span style='color:blue'>info</span></u>,code);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>347</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>348</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x63:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FISTP - </span>储存短整形数。</p>

<p class=a><u><span lang=EN-US style='color:blue'>349</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>put_long_int</span></u>(<u><span style='color:blue'>PST</span></u>(0),<u><span
style='color:blue'>info</span></u>,code);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>350</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpop</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>351</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>352</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x65:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FLD - </span>加载扩展（临时）实数。</p>

<p class=a><u><span lang=EN-US style='color:blue'>353</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpush</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>354</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>get_temp_real</span></u>(&amp;tmp,<u><span
style='color:blue'>info</span></u>,code);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>355</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(0));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>356</span></u><span
lang=EN-US>&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>357</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0x67:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FSTP - </span>储存扩展实数。</p>

<p class=a><u><span lang=EN-US style='color:blue'>358</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>put_temp_real</span></u>(<u><span style='color:
blue'>PST</span></u>(0),<u><span style='color:blue'>info</span></u>,code);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>359</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpop</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>360</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>361</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xa2:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FST - </span>储存双精度实数。</p>

<p class=a><u><span lang=EN-US style='color:blue'>362</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>put_long_real</span></u>(<u><span style='color:
blue'>PST</span></u>(0),<u><span style='color:blue'>info</span></u>,code);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>363</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>364</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xa3:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FSTP - </span>储存双精度实数。</p>

<p class=a><u><span lang=EN-US style='color:blue'>365</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>put_long_real</span></u>(<u><span style='color:
blue'>PST</span></u>(0),<u><span style='color:blue'>info</span></u>,code);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>366</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpop</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>367</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>368</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xa4:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FRSTOR - </span>恢复所有<span lang=EN-US>108</span>字节的寄存器内容。</p>

<p class=a><u><span lang=EN-US style='color:blue'>369</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
address = <u><span style='color:blue'>ea</span></u>(<u><span style='color:blue'>info</span></u>,code);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>370</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
for (code = 0 ; code &lt; 27 ; code++) {</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>371</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
((long *) &amp; <u><span style='color:blue'>I387</span></u>)[code] =</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>372</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>get_fs_long</span></u>((unsigned long *) address);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>373</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
address += 4;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>374</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;}</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>375</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>376</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xa6:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FSAVE - </span>保存所有<span lang=EN-US>108</span>字节寄存器内容。</p>

<p class=a><u><span lang=EN-US style='color:blue'>377</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
address = <u><span style='color:blue'>ea</span></u>(<u><span style='color:blue'>info</span></u>,code);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>378</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>verify_area</span></u>(address,108);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>379</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
for (code = 0 ; code &lt; 27 ; code++) {</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>380</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>put_fs_long</span></u>( ((long *) &amp; <u><span
style='color:blue'>I387</span></u>)[code],</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>381</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
(unsigned long *) address);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>382</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
address += 4;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>383</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
}</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>384</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>I387</span></u>.cwd = 0x037f;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>385</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>I387</span></u>.<u><span style='color:blue'>swd</span></u>
= 0x0000;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>386</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>I387</span></u>.twd = 0x0000;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>387</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>388</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xa7:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FSTSW - </span>保存状态字。</p>

<p class=a><u><span lang=EN-US style='color:blue'>389</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
address = <u><span style='color:blue'>ea</span></u>(<u><span style='color:blue'>info</span></u>,code);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>390</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>verify_area</span></u>(address,2);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>391</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>put_fs_word</span></u>(<u><span style='color:blue'>I387</span></u>.<u><span
style='color:blue'>swd</span></u>,(short *) address);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>392</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>393</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xe2:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FIST - </span>保存短整型数。</p>

<p class=a><u><span lang=EN-US style='color:blue'>394</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>put_short_int</span></u>(<u><span style='color:
blue'>PST</span></u>(0),<u><span style='color:blue'>info</span></u>,code);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>395</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>396</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xe3:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FISTP - </span>保存短整型数。</p>

<p class=a><u><span lang=EN-US style='color:blue'>397</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>put_short_int</span></u>(<u><span style='color:
blue'>PST</span></u>(0),<u><span style='color:blue'>info</span></u>,code);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>398</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<u><span
style='color:blue'>fpop</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>399</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>400</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xe4:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FBLD - </span>加载<span lang=EN-US>BCD</span>类型数。</p>

<p class=a><u><span lang=EN-US style='color:blue'>401</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpush</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>402</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>get_BCD</span></u>(&amp;tmp,<u><span
style='color:blue'>info</span></u>,code);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>403</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(0));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>404</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>405</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xe5:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FILD - </span>加载长整型数。</p>

<p class=a><u><span lang=EN-US style='color:blue'>406</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpush</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>407</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>get_longlong_int</span></u>(&amp;tmp,<u><span
style='color:blue'>info</span></u>,code);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>408</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(0));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>409</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>410</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xe6:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FBSTP - </span>保存<span lang=EN-US>BCD</span>类型数。</p>

<p class=a><u><span lang=EN-US style='color:blue'>411</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>put_BCD</span></u>(<u><span style='color:blue'>PST</span></u>(0),<u><span
style='color:blue'>info</span></u>,code);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>412</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpop</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>413</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>414</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0xe7:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// BISTP - </span>保存长整型数。</p>

<p class=a><u><span lang=EN-US style='color:blue'>415</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>put_longlong_int</span></u>(<u><span
style='color:blue'>PST</span></u>(0),<u><span style='color:blue'>info</span></u>,code);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>416</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpop</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>417</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>418</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }</span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>下面处理第<span lang=EN-US>2</span>类浮点指令。首先根据指令代码的位<span
lang=EN-US>10--9</span>的<span lang=EN-US>MF</span>值取指定类型的数，然后根据</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // OPA</span>和<span lang=EN-US>OPB</span>的组合值进行分别处理。即处理<span
lang=EN-US> 11011,MF,000,XXX,R/M</span>形式的指令代码。</p>

<p class=a><u><span lang=EN-US style='color:blue'>419</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; switch (code
&gt;&gt; 9) {</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>420</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// MF = 00</span>，短实数（<span lang=EN-US>32</span>位实数）。</p>

<p class=a><u><span lang=EN-US style='color:blue'>421</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>get_short_real</span></u>(&amp;tmp,<u><span
style='color:blue'>info</span></u>,code);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>422</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
break;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>423</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 1:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// MF = 01</span>，短整数（<span lang=EN-US>32</span>位整数）。</p>

<p class=a><u><span lang=EN-US style='color:blue'>424</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>get_long_int</span></u>(&amp;tmp,<u><span
style='color:blue'>info</span></u>,code);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>425</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
break;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>426</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 2:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// MF = 10</span>，长实数（<span lang=EN-US>64</span>位实数）。</p>

<p class=a><u><span lang=EN-US style='color:blue'>427</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>get_long_real</span></u>(&amp;tmp,<u><span
style='color:blue'>info</span></u>,code);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>428</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
break;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>429</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 4:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// MF = 11</span>，长整数（<span lang=EN-US>64</span>位整数）。！应是<span lang=EN-US>case 3</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>430</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>get_short_int</span></u>(&amp;tmp,<u><span
style='color:blue'>info</span></u>,code);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>431</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }</span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>处理浮点指令第<span
lang=EN-US>2</span>字节中的<span lang=EN-US>OPB</span>代码。</p>

<p class=a><u><span lang=EN-US style='color:blue'>432</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; switch
((code&gt;&gt;3) &amp; 0x27) {</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>433</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 0:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FADD</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>434</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fadd</span></u>(&amp;tmp,<u><span style='color:
blue'>PST</span></u>(0),&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>435</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(0));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>436</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>437</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 1:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FMUL</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>438</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fmul</span></u>(&amp;tmp,<u><span style='color:
blue'>PST</span></u>(0),&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>439</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(0));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>440</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>441</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 2:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FCOM</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>442</span></u><span
lang=EN-US>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<u><span
style='color:blue'>fcom</span></u>(&amp;tmp,<u><span style='color:blue'>PST</span></u>(0));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>443</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>444</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 3:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FCOMP</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>445</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fcom</span></u>(&amp;tmp,<u><span style='color:
blue'>PST</span></u>(0));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>446</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpop</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>447</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>448</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 4:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FSUB</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>449</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
tmp.exponent ^= 0x8000;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>450</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fadd</span></u>(&amp;tmp,<u><span style='color:
blue'>PST</span></u>(0),&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>451</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(0));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>452</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>453</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;case
5:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FSUBR</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>454</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>ST</span></u>(0).exponent ^= 0x8000;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>455</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fadd</span></u>(&amp;tmp,<u><span style='color:
blue'>PST</span></u>(0),&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>456</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(0));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>457</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>458</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;case
6:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FDIV</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>459</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fdiv</span></u>(<u><span style='color:blue'>PST</span></u>(0),&amp;tmp,&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>460</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(0));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>461</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>462</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
case 7:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
// FDIVR</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>463</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<u><span
style='color:blue'>fdiv</span></u>(&amp;tmp,<u><span style='color:blue'>PST</span></u>(0),&amp;tmp);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>464</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(0));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>465</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>466</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }</span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>处理形如 <span lang=EN-US>11011,XX,1,XX,000,R/M
</span>的指令代码。</p>

<p class=a><u><span lang=EN-US style='color:blue'>467</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if ((code &amp;
0x138) == 0x100) {&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; // FLD</span>、<span
lang=EN-US>FILD</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>468</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>fpush</span></u>();</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>469</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>real_to_real</span></u>(&amp;tmp,&amp;<u><span
style='color:blue'>ST</span></u>(0));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>470</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
return;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>471</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }</span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp; // </span>其余均为无效指令。</p>

<p class=a><u><span lang=EN-US style='color:blue'>472</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <u><span
style='color:blue'>printk</span></u>(<i>&quot;Unknown math-insns: %04x:%08x
%04x\n\r&quot;</i>,<u><span style='color:blue'>CS</span></u>,<u><span
style='color:blue'>EIP</span></u>,code);</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>473</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <u><span
style='color:blue'>math_abort</span></u>(<u><span style='color:blue'>info</span></u>,1&lt;&lt;(<u><span
style='color:blue'>SIGFPE</span></u>-1));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>474</span></u><span
lang=EN-US> }</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>475</span></u><span
lang=EN-US> </span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // CPU</span>异常中断<span
lang=EN-US>int7</span>调用的<span lang=EN-US>80387</span>仿真接口函数。</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>若当前进程没有使用过协处理器，就设置使用协处理器标志<span
lang=EN-US>used_math</span>，然后初始化<span lang=EN-US>80387</span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>的控制字、状态字和特征字。最后使用中断<span
lang=EN-US>int7</span>调用本函数的返回地址指针作为参数调用</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>浮点指令仿真主函数<span
lang=EN-US>do_emu()</span>。</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>参数<span lang=EN-US>
___false </span>是<span lang=EN-US> _orig_eip</span>。</p>

<p class=a><u><span lang=EN-US style='color:blue'>476</span></u><span
lang=EN-US> void <u><span style='color:blue'>math_emulate</span></u>(long
___false)</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>477</span></u><span
lang=EN-US> {</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>478</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if (!<u><span
style='color:blue'>current</span></u>-&gt;used_math) {</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>479</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>current</span></u>-&gt;used_math = 1;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>480</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>I387</span></u>.cwd = 0x037f;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>481</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>I387</span></u>.<u><span style='color:blue'>swd</span></u>
= 0x0000;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>482</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<u><span style='color:blue'>I387</span></u>.twd = 0x0000;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>483</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>484</span></u><span
lang=EN-US> <b><i>/* &amp;___false points to info-&gt;___orig_eip, so subtract
1 to get info */</i></b></span></p>

<p class=a><u><span lang=EN-US style='color:blue'>485</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <u><span
style='color:blue'>do_emu</span></u>((struct <u><span style='color:blue'>info</span></u>
*) ((&amp;___false) - 1));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>486</span></u><span
lang=EN-US> }</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>487</span></u><span
lang=EN-US> </span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>终止仿真操作。</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>当处理到无效指令代码或者未实现的指令代码时，该函数首先恢复程序的原<span
lang=EN-US>EIP</span>，并发送指定</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>信号给当前进程。最后将栈指针指向中断<span
lang=EN-US>int7 </span>处理过程调用本函数的返回地址，直接返回到</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>中断处理过程中。</p>

<p class=a><u><span lang=EN-US style='color:blue'>488</span></u><span
lang=EN-US> void <u><span style='color:blue'>__math_abort</span></u>(struct <u><span
style='color:blue'>info</span></u> * <u><span style='color:blue'>info</span></u>,
unsigned int signal)</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>489</span></u><span
lang=EN-US> {</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>490</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <u><span
style='color:blue'>EIP</span></u> = <u><span style='color:blue'>ORIG_EIP</span></u>;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>491</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <u><span
style='color:blue'>current</span></u>-&gt;signal |= signal;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>492</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; __asm__(<i>&quot;movl
%0,%%esp ; ret&quot;</i>::<i>&quot;g&quot;</i> ((long) <u><span
style='color:blue'>info</span></u>));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>493</span></u><span
lang=EN-US> }</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>494</span></u><span
lang=EN-US> </span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>累加器栈弹出操作。</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>将状态字<span lang=EN-US>TOP</span>字段值加<span
lang=EN-US>1</span>，并以<span lang=EN-US>7</span>取模。</p>

<p class=a><u><span lang=EN-US style='color:blue'>495</span></u><span
lang=EN-US> static void <u><span style='color:blue'>fpop</span></u>(void)</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>496</span></u><span
lang=EN-US> {</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>497</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; unsigned long tmp;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>498</span></u><span
lang=EN-US> </span></p>

<p class=a><u><span lang=EN-US style='color:blue'>499</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; tmp = <u><span
style='color:blue'>I387</span></u>.<u><span style='color:blue'>swd</span></u>
&amp; 0xffffc7ff;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>500</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <u><span
style='color:blue'>I387</span></u>.<u><span style='color:blue'>swd</span></u>
+= 0x00000800;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>501</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <u><span
style='color:blue'>I387</span></u>.<u><span style='color:blue'>swd</span></u>
&amp;= 0x00003800;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>502</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <u><span
style='color:blue'>I387</span></u>.<u><span style='color:blue'>swd</span></u>
|= tmp;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>503</span></u><span
lang=EN-US> }</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>504</span></u><span
lang=EN-US> </span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>累加器栈入栈操作。</p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>将状态字<span lang=EN-US>TOP</span>字段减<span
lang=EN-US>1</span>（即加<span lang=EN-US>7</span>），并以<span lang=EN-US>7</span>取模。</p>

<p class=a><u><span lang=EN-US style='color:blue'>505</span></u><span
lang=EN-US> static void <u><span style='color:blue'>fpush</span></u>(void)</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>506</span></u><span
lang=EN-US> {</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>507</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; unsigned long tmp;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>508</span></u><span
lang=EN-US> </span></p>

<p class=a><u><span lang=EN-US style='color:blue'>509</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; tmp = <u><span
style='color:blue'>I387</span></u>.<u><span style='color:blue'>swd</span></u>
&amp; 0xffffc7ff;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>510</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <u><span
style='color:blue'>I387</span></u>.<u><span style='color:blue'>swd</span></u>
+= 0x00003800;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>511</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <u><span
style='color:blue'>I387</span></u>.<u><span style='color:blue'>swd</span></u>
&amp;= 0x00003800;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>512</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <u><span
style='color:blue'>I387</span></u>.<u><span style='color:blue'>swd</span></u>
|= tmp;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>513</span></u><span
lang=EN-US> }</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>514</span></u><span
lang=EN-US> </span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>交换两个累加器寄存器的值。</p>

<p class=a><u><span lang=EN-US style='color:blue'>515</span></u><span
lang=EN-US> static void <u><span style='color:blue'>fxchg</span></u>(<u><span
style='color:blue'>temp_real_unaligned</span></u> * a, <u><span
style='color:blue'>temp_real_unaligned</span></u> * b)</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>516</span></u><span
lang=EN-US> {</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>517</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <u><span
style='color:blue'>temp_real_unaligned</span></u> c;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>518</span></u><span
lang=EN-US> </span></p>

<p class=a><u><span
 lang=EN-US style='color:blue'>519</span></u><span lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
 c</span><span lang=EN-US> = *a;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>520</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; *a = *b;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>521</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; *b = c;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>522</span></u><span
lang=EN-US> }</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>523</span></u><span
lang=EN-US> </span></p>

<p class=a><span lang=EN-US>&nbsp;&nbsp;&nbsp; // </span>取<span lang=EN-US>ST(i)</span>的内存指针。</p>

<p class=a><span lang=EN-US>&nbsp; &nbsp;&nbsp;// </span>取状态字中<span lang=EN-US>TOP</span>字段值。加上指定的物理数据寄存器号并取模，最后返回<span
lang=EN-US>ST(i)</span>对应的指针。</p>

<p class=a><u><span lang=EN-US style='color:blue'>524</span></u><span
lang=EN-US> static <u><span style='color:blue'>temp_real_unaligned</span></u> *
<u><span style='color:blue'>__st</span></u>(int i)</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>525</span></u><span
lang=EN-US> {</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>526</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; i += <u><span
style='color:blue'>I387</span></u>.<u><span style='color:blue'>swd</span></u>
&gt;&gt; 11;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;// </span>取状态字中<span
lang=EN-US>TOP</span>字段值。</p>

<p class=a><u><span lang=EN-US style='color:blue'>527</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; i &amp;= 7;</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>528</span></u><span
lang=EN-US>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; return (<u><span
style='color:blue'>temp_real_unaligned</span></u> *) (i*10 + (char *)(<u><span
style='color:blue'>I387</span></u>.st_space));</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>529</span></u><span
lang=EN-US> }</span></p>

<p class=a><u><span lang=EN-US style='color:blue'>530</span></u><span
lang=EN-US> </span></p>

<div class=a align=center style='text-align:center'><span lang=EN-US>

<hr size=4 width="100%" align=center>

</span></div>

<p class=MsoNormal><span lang=EN-US>&nbsp;</span></p>

<p class=MsoNormal><span lang=EN-US>&nbsp;</span></p>

</div>

</body>

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